.div-style-mian{
    padding: 25px;
    font-family: '宋体';
    font-size: 20px;
}
#hidden-s2-text{
    display: none;
}
#re-div-bg {
    display: none; /* 默认隐藏 */
    position: fixed; /* 固定定位 */
    z-index: 1; /* 设置在顶层 */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4);
}
#re-div-main {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 50%;
}
#re-span-exit {
    color: #aaa;
    float: right;
    font-size: 30px;
    transition: .5s;
}
#re-span-exit:hover,
#re-span-exit:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
    transform: rotateZ(270deg);
}